Is the formula that JSR gave me manometric or volumetric because Fnord said it was volumetric if that was the formula for volumetric can someone give me the formula for manometric.I don't think hybrid fueling 101 talks about it. If it does I'm sorry for not seeing it. So help with this would be great. Thank you.

8tonsemi, if you can't do something as simple as deriving the necessary fuel pressure for yourself, you really shouldn't be building hybrids. The only thing you need is an equation of state (EoS) for the gases in question, and in all "spudding" application to date, the ideal gas EoS is perfectly fine. As such, you need approximately grade nine level math to figure this out for yourself.

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Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.